Support for insulators.



W. N. SMITH.

SUPPORT POR INSULATORS. APPLICATION :PILED APn.2a.19os.

@XH/Mmmm PATENTED PEB. l1, 1908.

UNITED sTATEs PATENT OFFICE.

WILLIAM N. SMITH, OF YNKERS, NEW YORK.

surron'r ron INsULA'rons.

Speccation of Letters Patent.

Patented Feb. 11, 1908.

Application tied par 28.1906. serai Nt. 314.130.

To all whom 'it may concern: f

Be it known that vl, WILLIAM N. SMITH, a citizen oi the United States, residing at Yonkers, in the county .of Westchester and State l of New York, have invented certain new and useful Improvements in Supports for rInsulaters, of which the following is a specification, reference being had to the drawingv accompanying and forming part of the same.

My inventionrelates to devices for sup- 'porting the insulators which carry an electri cal conductor, and pertains more particularly to supporting .devices inthe nature of pins, mounted 'on' cross armsor similar fixtures carried by oles' or eql'livalentI structures.; Heretofore t e most common practice has been to iix the pins in holes in the cross arm. A wooden arm 1s seriously weakened-by such holes and isliable to crac or split, asin fact not inre uently happens yjhen there is any considera le strain-on the pins. Making -the holes smaller in diameter causes less im airrn ment to the strength' ofthe arm, but t e re-A duced diameter, of the in at that point weakens the; in, sc that V1t is itself iiable to breakage. ,urthermore, the' arm 'deteriorates more rapidl from exposure to the elements, since e oles afford access for moistu'tnto the interior of-thewood' causing -the sameto-decav prematurely. any ease;

j shrinkage of the wood 'is liable tefloosezfithe say, to

fha been.` set e at best in,'however. firmly it'may originally, andl tightening t not an easy matter.

My resent invention is designed'gtof'overcome t ese defects lyxproviding a pin' .or sup.- port which can be a ed to the-arm without 1n any wayimpairing 'the strength of the latter. y

A further-object is to provide fastening means which canreadily be tightened when-v ever from 'ang cause the pin may" have become loosene y l A further object is to lprovide a support in which the material com osingthe same isdistributed to the best a vantage, that is to stren .th or a given welg t.

, St' another object is to provide a support of this character which can be manufactured at comparatively-small cost'.-

In carryin 'ont my invention in its preferred forni employ a in having an venlargement constituting a liase which rests on the cross. arm and' `which lis preferably larve enouahjfto. extend entirely or substantially th'e base is pref rovide -a .sup ort of .maxirnurd I across the armi., Immediatel `above the base is a transverse a erture t roughV which passes a U-shaped bo t, embracing the arm.

. On the projecting ends of the bolt is a cross plateor strap held byenuts, by means of which the whole may firmly bound, thus securing thepin rigidly on the arm.' For the purpose of strengthening the pin it may be rovided "with reinforcing webs extending rom it to the base, and in order to obviate any possibility of the pin slippin onthe arm the underside of the. ase may e rovided with a ,suitablenunlber of pointe projections or teeth, which, under the pressure of the binding bolt, bite into the wood of the arm, or, in the case of a metalY arm, extend v from theangles b' are strengthening. Webs b2,

which. reinforce the pin against strains exerted longitudinally of the cross "arm, and extending fron'h the centers of the side edges are webs b, Winch reinforce the pin against 'strains exerted transversely of the arm d "Extending through the axis of the pin, immediately above the base, isa transverse aperture D, to receive the U-bolt E, which straddles or embraces the arm and has its threaded ends e, e', extending below the arm,

through apertures in the ends of a strap .or cross plate F. On'` the ends of the'bolt'are nuts e2, e, by means of which the bolt may be drawn down, thus binding thepinon the ann. as tightly'as desired. For additional secrity the'underside of the base of the pin 'is preferablyl provided with downwardly pro jecting teet or points b", which bite into the arm, or in the case of 'a metal arm, extend into suitable apertures therein, and thus effectually preventthe base from slipping on the arm. y l

As will bessen 'in the drawing, the transverse opening D is-preferably made flaring at its ends, giving the o ening something o an hour-glass or vhyperbloid shape, with its any form or contour, dependingl on the t` e smallest diameter at its center, and the flare l of the ends of the aperture is preferablyl greatest along the vertical diameter, thus -making the orifices more or less elliptical in form. An opening of this character, that is, with flaring orifices, permits the U-bolt'to be passed through it at any time, either before or after the insulator is secured to the pin, and either before or after the in is placed in position on the cross arm. he upper end of the pin, which receives the insulator, may be of of insulator which itis to support. It mig t even be formed with an e e, to receive an insulating bushing, but as t ie formation of this part of the pin is wholly immaterial it is unnecessary to illustrate the-same further than as shown in the drawing.

The pin and its base and strengthening webs are all integral with each other, and the device is therefore much stronger than if the A pin and base were made in separate pieces and merely fastened together. The arched vcontour of seat for the bolt in the aperture is 25 tributed so as to give the maximum strength.

Including the binding nuts the entire sup ort consists of but five pieces. The pin and iiase may be formed by casting, stamping, or forging, and the bolt may be readily bent from a bar of the proper length, while the holes in the strap to receive the ends of the bolt may be punched. Hence the only machining required is the threading of the bolt ends. The rod forming the U-bolt may be of any standard size and hence can be ob- .tained readily and cheaply in any market.

The pointed projections or teeth on the base prevent any slipping or sidewise displace ment of the pin 1f the same should become loose by shrinkageA of the arm, while such shrinkage may at any time be taken up and the plin firmly tightened merely by screwing up t. e butts. ff desired, the insulators can be cemented or otherwise fastened to the pins in the shop or stock room, and the U- olt can be passed through the opening therefor after the device is placed in position on the arm. In thisway the cementing of the insulator and pin can be done under the best conditions, in the shopY or stock room, and a firm connection msured, which m ht not be the case if the assembling vwere all one in the I field, where the weather often constitutes a serious obstacle to 'ood work. At the same ierent fore to secure an insulator pin to a cross arm by means of a more or less U-shaped bolt straddling the arm, but these prior constructions -have allv lacked .the simplicity and cheapness necessary to bring them into gen'- .era'l' use.

What i claim is: 1 v

1. The combination with a One-pieceinsllflator-support, comprising-"a pin ar'dla-',tran's-A verse base formed integral with each Vother,v and having a transverse perforation" above i am aware that it has been proposed ,bev-4 apted for the base, saidbas'e being adapted' to seat on A ,'a cross arm; of a lLJ-bolt extending throul h 'the perforation with its bend seated in'te perforationy. the Ibolt being adapted to straddle or embrace the cross arm;4 astrap or cross plate having apertures through which the.

ends of the bolt ass; and nuts on the ends of the bolt, where y the whole may be firmly bound upon the cross arm; as set forth.

2. As a new article of manufacture, a one*x piece insulator support, consisting'- of a pin aving a transverse perforation near one end thereof, and a transverse base, formed integrally with the pin, on the end of the latter adjacent to the said perforation, as set forth.

3. As a new article of manufacture, a oneieee insulator support, consisting of a pin aving an integral transverse base at one end and a transverse perforation above the base, and radially arranged strengthening webs between the pin and the base, as set forth.

4. As a new article of manufacture, a oneiece insulator support, consisting of a Apin aving a transverse base formed integrally at one end thereof, with integral strengthening webs arranged radially about the 4pin between the pin and the base, andhaving a transverse perforation above the base, the ends cf the perforation being flaring, and the perforation constituting an arched seat, as set forth.

l WLLIAM N..sM'1 rH-.

VVitnesses: l

S. SQDUNHAM,

TnoMAs. J. BYRNEs.'

ilo 

